<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.$store.state.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            @click="changeCity(item.name)"
            class="button-wrapper"
            v-for="item in hotCities"
            :key="item.id">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div :ref="key" class="area" v-for="(item,key) in cities" :key="key">
        <div class="title border-topbottom">{{key}}</div>
        <div
          @click="changeCity(item1.name)"
          class="item-list"
          v-for="item1 in item"
          :key="item1.id">
          <div class="item border-bottom">{{item1.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState } from 'vuex'

export default {
  props: ['hotCities', 'cities'],
  data: function () {
    return {}
  },
  methods: {
    changeCity: function (city) {
      this.$store.commit('saveCity', city)
      this.$router.push('/')
    }
  },
  mounted () {
    const options = {
      click: true,
      tap: true
    }
    this.scroll = new BScroll(this.$refs.wrapper, options)
  },
  watch: {
    letter: function () {
      var element = this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
    }
  },
  computed: {
    ...mapState(['letter'])
  }
}
</script>

<style lang="stylus" scoped>
  @import '../../assets/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc

    &:after
      border-color: #ccc

  .border-bottom
    &:before
      border-color: #ccc

  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0

    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem

    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem

      .button-wrapper
        float: left
        width: 33.33%

        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem

    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
